

Dr Kim is a real customer in Cave Creek, Arizona. His APS (Arizona Public Service) utility plan was changed from the popular “time of use” rate plan to the “Demand rate” Plan and installed the EnergySentry device.
The Kim Family saved more than 30% on their utility costs over the following 12 months post installation.
Same house. Same AC units. Real Savings.
A licensed electrician installs the EnergySentry device beside your main electrical control panel. No permits, no roof work, no solar panels.
EnergySentry monitors and orchestrates your home's KW usage by staggering your AC, water heater, and other appliances so your demand won't all spike at once.
Your home stays exactly the way you like it. No thermostat wars — just savings. Most customers see 30–50% off their very first bill.
Whether you're on a time-of-use or demand billing rate — your utility company measures and punishes you for all of your electrical appliances hitting the grid at once. Those KW spikes set your demand charge for the entire billing cycle.
When your AC cycles, your water heater fires, your dryer tumbles, and your EV charger or pool pump kicks on during the same 15-minute period — your utility company reacts by charging you hundreds of dollars extra to your monthly bill. You used the same total electricity. You just used too much of it at the same time.
The Energy Sentry 9388A installs at your electrical panel and manages your non-essential, high-load appliances automatically. It constantly calculates the rate at which your electric use is approaching your demand limit and sheds loads accordingly — preventing the spikes that trigger costly demand charges.
It works on the "store/defer" principle. Loads like water heaters, ACs, pool pumps, and dryers contain thermal storage — they can cycle off briefly with zero impact on comfort. Same kWh consumed. Dramatically lower bill.
"I was paying over $500 every single month and figured that's just the way it is now. My neighbor told me about Energy Sentry. Thirty days later my bill was $266. I could not believe it when I opened the statement."
"We're on the APS demand plan. I kept the house at 71 all July — kids home all day, pool pump running — and the bill still came in $185 lower. My husband checked the math three times."
"Two AC units, a pool pump, and an EV charger. The install took about 45 minutes and we honestly forgot it was there — until the next bill showed up $310 lighter. Should have done this years ago."
"I was skeptical — sounded too good to be true. The electrician was in and out in 40 minutes. First bill after: $228 lower, no change to how we live. Told three neighbors already."
"We run the AC at 68 for the kids and never worried about the bill again. It handles the water heater and dryer scheduling automatically — we don't even notice it working."
Find out exactly what your bill should actually be — in two minutes, for free, with zero commitment.
Answer a few quick questions — takes about 60 seconds.